ROCKWOOL® Rigid, Semi-rigid and Flexible Slabs are high quality resin bonded slabs that can be used for Thermal, Acoustic and Fire Insulation.

They are manufactured in a variety of thicknesses and densities to suit most requirements.  They are suitable for many applications including thermal insulation for floors, walls, roofs and boiler rooms. Ventilation plant in all types of buildings, offshore platforms and ships, acoustic ceilings and partition panels.

Advantages

  • Excellent thermal, acoustic and fire insulation
  • Water repellant
  • Resists high temperatures
  • Easy to handle and install
  • Cost effective
  • Nomaintenance
  • Black or white tissue and aluminium foil facings available

 

Descriptions, performance and properties:

Standards: ROCKWOOL® Slabs conform to BS EN 13162: 2001. Thermal insulation products for buildings- factory made mineral wool ( MW) products- specificaiton, and satisfy the requirements of BS 5422.

Dimensions:

Thicknesses: 25*, 30, 40, 50, 60, 70 and 100mm

kg/m3 Size (mm) Thickness
RWA45 45 1200 × 600+ 30,40,50,60,75,100
RW3 60 1200 × 600+ 25,30,40,50,60,75,100
RW4 80 1000 × 600 50,75,100
RW5 100 1000 × 600 25,30,40,50,60,75,100
RW6 140 1000 × 600 30,50,75,100

*25mm is a non-standard thickness for RW6 / + All ‘faced’ RWA45 and RW3 thicknesses will be 1000 x 600mm in size.

Finishes: Non-woven mineral black or white tissue, aluminium foil are available.

Environment: No CFCs, HFCs or HCFCs are used in the manufacture of ROCKWOOL® materials.

 

Performance and Properties:

Resistance to compression

Stress req’d to product 10% compression (kN/m2)                     Stress req’d to reach elastic limit ∂e (kN/m2)                             Displacement at 5 kN/m2 stress
RWA45 3.0 3.5 16.5
RW3 6.7 6.1 7.0
RW4 12.9 9.2 5.5
RW5 16.4 11.3 4.6
RW6 28.2 26.1 4.2

 

Maximum service temperatures: The maximum recommended service temperature of unfaced Slabs depends on the composition of the product.

ROCKWOOL® Slabs are bonded with a phenolic resin which is resistant to temperatures up to 230°C. They may be used at much higher temperatures, but some resin will be lost close to the hot surface.

Bending Radius: Curved surfaces can be insulated with  ROCKWOOL® Slabs. The table below provides the minimum bending radius for several ROCKWOOL® Slabs.

Minimum bending radius for ROCKWOOL® Slabs.

Product Slab thickness  (mm)
30 40 50 60 75

80

100
RWA45 425 500 700 900 1200

1300

1800
RW3 425 500 700 1000 1350

1500

1900
RW5 550 700 1000 1500 2250

2500

2500
RW6 1500 1900 2600 3000 3300

3400

3500

 

Acoustics:

ROCKWOOL® stone wool works in two distince ways to reduce noise, either by impeding the transmission of sound through an element of the structure or by absorption of sound at the surface.

The structure of the fibres in ROCKWOOL® Slabs make them ideal for use as a sound absorber, with characteristically high co-efficients over a wide frequency range.

Tissue faced slabs:

Slab size: 1000mm x 600mm

ROCKWOOL® manufacture a wide range of tissue faced, line produced slabs, ranging from 45 kg/m3 to 140kg/m3. The tissues are bonded to the face of the slabs with binder which provides a superior acoustic and fire performance to fabricated, adhesive applied, tissue faced products.

70 gramme black and 100 gramme white tissue options are available from ROCKWOOL®.

Thermal conductivity [industrial applications]:

Mean Temperature ºC     Values (W/mK)
RWA45 RW3 RW4 RW5 RW6
50 0.040 0.039 0.038 0.037 0.037
100 0.050 0.047 0.045 0.044 0.044
150 0.063 0.058 0.055 0.054 0.051
200 0.070 0.066 0.064 0.060
250 0.079 0.075 0.070
300 0.088 0.081
350 0.104 0.093
400 0.122 0.106

Tested in accordance with BS874: 1973. Cold face temperature 40ºC.

Absorption coefficiencts for selected ROCKWOOL® Slabs:

Material Thickness(mm) Mounting 125 250 Frequency500 (HZ)1K

2K

4K
Slab RW3 50 Direct 0.11 0.60 0.96 0.94 0.92 0.82
Slab RW3 75 Direct 0.34 0.95 1.00 0.82 0.87 0.86
Slab RW5 30 Direct 0.10 0.40 0.80 0.90 0.90 0.90
Slab RW5 30 300 mm gap 0.40 0.75 0.90 0.80 0.90 0.85
Slab RW5 75 Direct 0.40 0.75 0.90 0.80 0.90 0.85
Slab RW6 50 Direct 0.20 0.75 0.90 0.85 0.90 0.85
Slab RW6 50 300 mm gap 0.65 0.55 0.75 0.85 0.75 0.85

The absorption coefficients shown above are typical figures that can be achieved by unfaced ROCKWOOL® products.

 

Applications:

1) Industrial Uses:

Thermal and acoustic for boilers, ducts and vessels, particularly in the chemical, petro-chemical and power generating industries. Generally, for furnaces, ovens, calorifiers, hot-water boilers, storage tanks, drying equipment and air conditioning plant.

2) Fire Protection: Floors

RW5 Soffit Slabs have been assessed by LPC as a suitable product for upgrading the fire resistance of dense concrete slabs ( for up to 2hrs)

RWA45 Slabs can also be used to firestop small voids, in particular the gap under pitched tile roofs in dwellings.

3) Acoustic control:

The Slabs are particularly suitable for acoustic infills in partitions and ceilings, providing a high level of control of both airborne and structure-borne sounds.

They are also suitable for acoustic absorption in the linings of buildings, RW3 being particularly good in sound studios. Rigid Slabs can be used in industrial applications such as acoustic splitters and acoustic damping of ducts.

Find out more about soundproofing and acoustics in construction here.